Calculation of RRF Value & Actual %

GOOD VALIDATION PRACTICE (cGVP) LABORATORY, METHOD AND ANALYTICAL VALIDATION
1

I injected one sample. There are 5 peaks.

no. of Peaks Area %
1 600 31.17
2 150 7.79
3 400 20.78
4 75 3.96
5 700 36.30
_______ _______
1925 100.00

Now, Response Factor of peak 5 is 1.0000 & RRF of peak 4 is 1.5 relative to peak 5. So,Actual % of peak 4 is 3.96*1.5=5.94%. How can I calculate Actual % of other peaks?